CN213749933U

CN213749933U - Full-sealed waterproof rotation speed sensor

Info

Publication number: CN213749933U
Application number: CN202022307254.1U
Authority: CN
Inventors: 崔艳凤; 侯鸿道; 兰之康
Original assignee: Nanjing Gaohua Technology Co ltd
Current assignee: Nanjing Gaohua Technology Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-07-20
Anticipated expiration: 2030-10-16

Abstract

The present disclosure provides a waterproof rotational speed sensor of totally enclosed type, waterproof rotational speed sensor of totally enclosed type includes: a housing; the rotating speed sensing assembly is arranged in the first end of the shell along the length direction of the shell in a sealing mode; the rear cover is connected with the second end of the shell along the length direction in a sealing mode; and a first end of the cable assembly penetrates through the rear cover to be electrically connected with the rotating speed sensing assembly in the shell, and a second end of the cable assembly is positioned outside the shell so as to output a rotating speed signal measured by the rotating speed sensing assembly. The fully-sealed waterproof speed sensor disclosed by the invention adopts the Faraday electromagnetic induction principle, converts the mechanical rotation quantity of a coded disc to be detected into electric quantity for output, outputs the electric quantity through the cable assembly like a sine wave, can effectively prevent water, can be soaked in water for more than 48 hours without leakage, and has the characteristics of convenience in installation, salt spray resistance and water resistance.

Description

Full-sealed waterproof rotation speed sensor

Technical Field

The utility model belongs to the technical field of the sensor, concretely relates to waterproof rotational speed sensor of totally enclosed type.

Background

The rotation speed sensor is a sensor for converting the rotation speed of a rotating object into electric quantity to be output, belongs to an indirect measuring device, can be manufactured by a mechanical method, an electrical method, a magnetic method, an optical method and a mixed method, and can be divided into an analog type and a digital type according to different signal forms.

Conventionally, a rotation speed sensor converts the mechanical rotation quantity of a detected code disc into electric quantity output in a coil, generally outputs a signal through an electric connector, and does not have a waterproof function.

SUMMERY OF THE UTILITY MODEL

The present disclosure is directed to at least one of the problems of the prior art, and provides a fully-sealed waterproof speed sensor.

The present disclosure provides a waterproof rotational speed sensor of totally enclosed type, waterproof rotational speed sensor of totally enclosed type includes:

a housing;

the rotating speed sensing assembly is arranged in the first end of the shell along the length direction of the shell in a sealing mode;

the rear cover is connected with the second end of the shell along the length direction in a sealing mode;

and a first end of the cable assembly penetrates through the rear cover to be electrically connected with the rotating speed sensing assembly in the shell, and a second end of the cable assembly is positioned outside the shell so as to output a rotating speed signal measured by the rotating speed sensing assembly.

In some optional embodiments, the hermetically sealed waterproof tachometer sensor further includes a first high temperature potting adhesive filled in a cavity between the rear cover and the housing.

In some optional embodiments, the hermetically sealed waterproof speed sensor further comprises a protection ring, and the protection ring is hermetically connected with one end of the rear cover, which faces away from the housing.

In some optional embodiments, a second high temperature potting adhesive is disposed within the protective ring.

In some optional embodiments, the hermetically sealed waterproof rotational speed sensor further includes a plug, and the plug is hermetically connected to a first end of the housing along a length direction of the housing.

In some optional embodiments, the rotational speed sensing assembly comprises a core, a bobbin, a coil, and a magnet;

the iron core is arranged in the coil framework in a penetrating mode, a first pole of the magnet is connected with the coil framework, the coil is wound on the coil framework, and the coil is electrically connected with a first end of the cable assembly.

In some optional embodiments, the rotational speed sensing assembly further comprises a protection wire, and the protection wire is wound on the coil.

In some optional embodiments, the hermetically sealed waterproof rotational speed sensor further comprises a spring shield that covers the outside of the elastic region of the cable assembly.

In some optional embodiments, the totally enclosed waterproof tachometer sensor further comprises a spring shield connected to an end of the protection ring facing away from the rear cover and to the spring shield.

In some optional embodiments, the hermetically sealed waterproof speed sensor further comprises a heat shrink sleeve, the heat shrink sleeve being sleeved over the spring shield.

The fully-sealed waterproof speed sensor disclosed by the invention adopts the Faraday electromagnetic induction principle, converts the mechanical rotation quantity of a coded disc to be detected into electric quantity for output, outputs the electric quantity through the cable assembly like a sine wave, can effectively prevent water, can be soaked in water for more than 48 hours without leakage, and has the characteristics of convenience in installation, salt spray resistance and water resistance.

Drawings

Fig. 1 is a schematic structural diagram of a fully-sealed waterproof speed sensor according to an embodiment of the present disclosure.

Detailed Description

For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in fig. 1, the totally enclosed waterproof speed sensor comprises a housing 6, a speed sensing assembly, a rear cover 8 and a cable assembly 13. The speed sensing assembly is sealingly arranged in a first end of the housing 6 along its length, i.e. in the left end of the housing 6 as shown in fig. 1. The rear cover 8 is hermetically connected to the second end of the housing 6 along the length direction thereof, that is, as shown in fig. 1, the rear cover 8 is hermetically connected to the right end of the housing 6, and the rear cover 8 may be welded to the housing 6 to achieve the hermetic connection therebetween. A first end of the cable assembly 13 passes through the rear cover 8 to be electrically connected with the rotation speed sensing assembly in the housing 6, and a second end of the cable assembly 13 is located outside the housing 6 to output a rotation speed signal measured by the rotation speed sensing assembly.

The totally enclosed type waterproof revolution speed sensor of this embodiment adopts Faraday electromagnetic induction principle, converts the mechanical rotation volume of being surveyed the code wheel into electric quantity output, and class sine wave rethread cable subassembly is exported, and the totally enclosed type waterproof revolution speed sensor of the embodiment of this disclosure can be effectively waterproof, can soak not leak more than 48h in aqueous, and this kind of revolution speed sensor has the installation convenient, salt fog resistant and waterproof characteristics.

Exemplarily, as shown in fig. 1, the totally enclosed waterproof speed sensor further includes a first high temperature potting adhesive 14, the first high temperature potting adhesive 14 is filled in a cavity between the rear cover 8 and the housing 6, and the first high temperature potting adhesive 14 is arranged to perform vibration impact resistance and waterproof function.

Illustratively, as shown in fig. 1, in order to further improve the vibration impact resistance and the waterproof performance of the rotation speed sensor, the totally-sealed waterproof rotation speed sensor further comprises a protection ring 9, the protection ring 9 is hermetically connected with one end of the rear cover 8, which is away from the housing 6, for example, the protection ring 9 can be welded on the rear cover 8 by means of electron beam welding, so that the vibration impact resistance and the waterproof performance can be achieved.

Illustratively, as shown in fig. 1, in order to further improve the vibration impact resistance and the waterproof performance of the revolution speed sensor, a second high-temperature pouring sealant 15 is arranged in the protection ring 9.

Illustratively, as shown in fig. 1, the rotational speed sensing assembly includes a core 2, a bobbin 3, a coil 4, and a magnet 7. The iron core 2 is arranged in the coil framework 3 in a penetrating mode and can be fixed in the coil framework 3 through gluing. A first pole (e.g., S pole) of the magnet 7 is connected to the bobbin 3, and specifically, the first pole of the magnet 7 may be connected to the bobbin 3 through epoxy glue to perform a function of sensing a rotation speed. The coil 4 is wound on the bobbin 3, the coil 4 may be an enameled wire, and the coil 4 is electrically connected to the first end of the cable assembly 13, so that the cable assembly 13 can convert the sensed rotation speed signal into a sine-like wave signal and output the sine-like wave signal.

In the revolution speed sensor of the embodiment, the change of the test distance of the tested code disc causes the change of the internal magnetic resistance of the iron core, so that the magnetic induction intensity in the iron core is changed, namely the magnetic flux in the coil is changed, so that the changed magnetic flux generates a periodic current signal in the coil, and the mechanical quantity is finally converted into electric quantity for output.

Illustratively, as shown in fig. 1, the totally enclosed waterproof speed sensor further includes a plug 1, and the plug 1 is connected to a first end of the housing 6 along a length direction thereof in a sealing manner, that is, as shown in fig. 1, the plug 1 is disposed at a side of the speed sensing assembly, so as to protect the coil 4 inside the housing 6.

Illustratively, as shown in fig. 1, the rotational speed sensing assembly further includes a protection wire 5, the protection wire 5 is wound on the coil 4, the protection wire 5 may be a cotton wire, and after being wound on the coil 4, the protection wire is fixed by dipping insulating paint, so that the protection wire can play a role in resisting vibration and impact.

Exemplarily, as shown in fig. 1, the totally enclosed waterproof speed sensor further includes a spring shield 11, the spring shield 11 is covered outside the elastic region of the cable assembly 13, and the spring shield 11 can effectively prevent the root of the cable from being bent and damaged.

Exemplarily, as shown in fig. 1, the totally enclosed waterproof speed sensor further includes a spring protecting cover 10, the spring protecting cover 10 is connected to one end of the protecting ring 9 away from the rear cover 8, and is connected to the spring protecting cover 10, and the spring protecting cover 10 is further matched with the spring protecting cover 11, so as to further effectively prevent the root of the cable from being bent and damaged.

Exemplarily, as shown in fig. 1, the totally enclosed waterproof speed sensor further includes a heat-shrinkable sleeve 12, and the heat-shrinkable sleeve 12 is sleeved on the spring shield 11 and plays a role in protecting the spring shield 11.

It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.

Claims

1. A hermetically sealed waterproof speed sensor, comprising:

a housing;

2. The hermetically sealed waterproof rotational speed sensor according to claim 1, further comprising a first high temperature potting adhesive filling a cavity between the rear cover and the housing.

3. The hermetically sealed waterproof rotational speed sensor according to claim 1, further comprising a protective ring sealingly connected to an end of the rear cover facing away from the housing.

4. The totally enclosed waterproof rotational speed sensor according to claim 3, wherein a second high temperature potting adhesive is provided inside the protection ring.

5. The hermetically sealed waterproof rotational speed sensor of claim 1, further comprising a plug sealingly connected to a first end of the housing along a length thereof.

6. The totally enclosed waterproof rotational speed sensor according to any one of claims 1 to 5, wherein the rotational speed sensing assembly includes a core, a bobbin, a coil, and a magnet;

7. The hermetically sealed waterproof tacho sensor of claim 6 wherein the tacho sensing assembly further comprises a protective wire wound around the coil.

8. The hermetically sealed waterproof rotational speed sensor according to any one of claims 1 to 5, further comprising a spring shield that is provided outside the elastic region of the cable assembly.

9. The hermetically sealed waterproof rotational speed sensor of claim 8, further comprising a spring shield, wherein when the hermetically sealed waterproof rotational speed sensor comprises a protection ring, the spring shield is connected to an end of the protection ring facing away from the back cover and to the spring shield.

10. The hermetically sealed waterproof rotational speed sensor of claim 8, further comprising a heat shrink sleeve that is sleeved over the spring shield.